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I'm inclined to agree with some of the other posts here -- weak spring or generally defective magazine. That it occurs on the 2nd or 3rd round isn't terribly surprising -- 1911's are famous for feed issues on the third round, and the third to the last round -- and these are almost always tied to spring timing issues.

They're the only pistols I recommend non-factory magazines for consistently. I use Wilson and Chip McCormick magazines myself, but as mentioned, the Tripps are top-notch, and there are a few other brands that are proving reliable these days.

Even on guns that do present true (non magazine related) issues, I personally don't recommend working on one or sending it back for touch-up until it's had 500 factory rounds through it. I typically use Winchester White Box ammo as a "test bed" when I'm running into issues, but I've been satisfied with PMC and Blazer Brass as well -- all three brands seem to make SAMMI spec.

You asked about references to OAL -- it's a reloader's term, referring to the OverAll Length of the round. It's but one factor when it comes to 1911 feeding issues -- there are also profile considerations. Again the PMC, Winchester, and Blazer Brass seem to have the proper bullet profile for feeding in unmodified 1911-pattern pistols (and in the context I'm referring to, there are very few, if any "unmodified" pistols on the market--most have throat angle and ramp improvements over the original Military Spec).

Sorry -- didn't mean to get too technical here. In short, try a Chip McCormick, TripLite, or Wilson magazine, run another 450 rounds through the gun, and I'd bet it smooths out. If not, then it's time to take a hard look at what's going on. 1911's usually require a break-in period, and frankly, the better built the pistol is, the more likely it is to need a break-in.

Hope this helps!